<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="https://www.baidu.com">
    用户名：<input type="text" name="name" maxlength="5" placeholder="请输入用户名">
  <br>
    密码：<input type="text" name="password">
  <input type="submit" value="注册">
</form>
</body>
</html>